/Engine/Source/Runtime/Navmesh/Public/Detour/DetourNavMesh.h
Off-mesh connections are stored in the navigation mesh as special 2-vertex polygons with a single edge. At least one of the vertices is expected to be inside a normal polygon. So an off-mesh connection is "entered" from a normal polygon at one of its endpoints. This is the polygon identified by the prevRef parameter.
The status flags for the operation.
dtStatus getOffMeshConnectionPolyEndPoints ( dtPolyRef prevRef, dtPolyRef polyRef, const dtReal * currentPos, dtReal * startPos, dtReal * endPos ) const